Ensure TLS

You may want to ensure TLS is used, either directly or via ``STARTTLS``,

for sending mail over SMTP regardless of other options set or SMTP server

support. You can set TLS as required by calling ``setRequireTls(true)``

on the ``EsmtpTransport`` instance, or by setting the ``require_tls`` option

to ``true`` in the DSN::

You may want to ensure that TLS is used (either directly or via ``STARTTLS``)

when sending mail over SMTP, regardless of other options or SMTP server support.

To require TLS, call ``setRequireTls(true)`` on the ``EsmtpTransport`` instance,

or set the ``require_tls`` option to ``true`` in the DSN::

When TLS isset asrequired, a:class:`Symfony\\Component\\Mailer\\Exception\\TransportException`

will bethrown if a TLS connection cannot beachieved during initialcommunications

When TLS is required, a:class:`Symfony\\Component\\Mailer\\Exception\\TransportException`

isthrown if a TLS connection cannot beestablished duringtheinitialcommunication

with the SMTP server.

..note::

This setting onlyworks when the ``smtp://`` protocol is used.

This setting onlyapplies whenusingthe ``smtp://`` protocol.

..versionadded::7.3